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CataractA cataract is an opacity that develops in the crystalline lens of the eye or in its envelope. About half of Americans older than 65 have some degree of clouding of the lens. After age 75, as many as 70 percent of Americans have cataracts that are significant enough to impair their vision.A cataract is a clouding of the natural lens, the part of the eye responsible for focusing light and producing clear, sharp images. As old cells die they become trapped within the capsule. Cataracts commonly affect distance vision and cause problems with glare Looking through a cloudy lens is like trying to see through a frosty or fogged-up window. Over time, the cells accumulate causing the lens to cloud, making images look blurred or fuzzy. Cataract derives from the Latin cataracta meaning "waterfall" and the Greek kataraktes and katarrhaktes , from katarassein meaning "to dash down" (kata -, "down"; arassein , "to strike, dash"). But as the clouding progresses, the cataract eventually interferes with your vision. In the early stages, stronger lighting and eyeglasses can help you deal with the vision problems. But at some point, if impaired vision jeopardizes your normal lifestyle, you might need surgery. Fortunately, cataract removal is one of the safest, most effective and most common surgical procedures. A cataract is a cloudy or opaque area (an area you cannot see through) in the lens of the eye. The name cataract stems from an ancient conception of something cascading from the "brain of humors" and depositing itself in front of the lens. The retina is the eye's light-sensitive layer that sends signals to the brain that are interpreted as vision. Protein arranges itself to allow light rays to pass through and to focus the rays onto the retina. Other symptoms include faded colors, poor night vision, difficulty in reading, problem with bright light etc. Clouded vision can make it more difficult to read, drive a car especially at night or see the expression on a friend's face. In fact, they are the leading cause of visual loss among adults 55 and older. Eye injuries, certain medications, and diseases such as diabetes and alcoholism have also been known to cause cataracts. Sometimes, protein clumps together, clouding small areas of the lens and blocking some light from reaching the retina. The rate of cataract progression can be unpredictable. Some cataracts worsen significantly within a few weeks; others remain unchanged for many years. Causes of CataractThe common Causes of Cataract :
Symptoms of CataractSome Symptoms of Cataract :
Treatment of Cataract
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